Huntsville spreads out from Big Spring Park in every direction, and nearly all of it depends on the car. I-565 runs east-west from I-65 near Decatur, past the airport, Madison and the U.S. Space and Rocket Center, and into downtown, where it meets Memorial Parkway. The Parkway, which carries US 231 through the city, is the north-south spine, with elevated overpasses through the middle and long stretches of signals at either end. US 72 follows University Drive west toward Madison and Athens and heads east past Gurley toward Scottsboro.
The pressure points follow the work. Redstone Arsenal fills the city's southwest side, and its gates draw heavy commuter traffic every morning and afternoon along Rideout Road and the south end of the Parkway. Research Park Boulevard funnels engineers toward Cummings Research Park, and Governors Drive, carrying US 431, climbs east over Monte Sano toward Hampton Cove. A car that overheats in the Arsenal line or quits on the Parkway at rush hour is exactly the situation a mobile mechanic is built for.
Huntsville International Airport sits west of town off I-565, close to Madison, and its long-term lots are a regular service stop. Away from the arteries, most neighborhoods are easy to reach: older streets near downtown and Five Points, cul-de-sacs in South Huntsville and new subdivisions out toward Harvest and Monrovia. The city bus system covers the core but not much else, so most households need every car they own running.